Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0fa1d29aa89e8c…

MALICIOUS

PDF

88.6 KB Created: 2021-09-18 23:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 77e511fb1c21898454dc032e8ec25013 SHA-1: f40a28aceece2da616e471fc95177d93fec9e25d SHA-256: 8a0fa1d29aa89e8c105926105ee67be3af32c7f8c479e8cac7314048cd9bcb67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pixomot.ru/uplcv?utm_term=how+to+recover+photos+and+videos+from+phone PDF link annotation
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/riruwojuboxegawijada.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/37409369070.pdfIn PDF document text
    • http://jainfarms.com/uploads/kuxegirotev.pdfIn PDF document text
    • http://droneducational.com/admin/userfiles/file/gavifegaxemimo.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9d6ae6cbe---jupatebilamowunelubo.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/boduv.pdfIn PDF document text
    • http://support-cmu.com/filedata/file/sosibagumefox.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210905_92D42C24274143E5.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/tejukolozadevubi.pdfIn PDF document text
    • http://allineers.netlovestories.com/upload/files/13148968860.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/buvonuvitenonidixo.pdfIn PDF document text
    • http://egitara.com/upfiles/files/denexag.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/gexujafatipukiran.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/kigofumotalo.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/90fe10811e80c9eede8b9bb58d0a5c5a/35633820629.pdfIn PDF document text
    • http://premiercontainerlines.com/media/ftp/file/23616032796.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/6795011886.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161342f1d671d9---67259905604.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/3724da3691f3182f9c6a1709bf8ff01e/2808017630.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/xatipi.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/wezopijizuvumibe.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/82218014609.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161349532d2bc6---dagudulerezepowit.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EB 18928 bytes
SHA-256: 406ea0e4ca43333f65830da3d44a8b7381cbb96cb123735a137b554b95880e7e
font_01_sfnt_off000122fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FC 10980 bytes
SHA-256: 07bb0bd7e17660a6dcd94381cb49025216fd955b242c77a1f9a7ebb26d86963a
font_02_sfnt_off00013c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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